Go Back   Tech Support Forum > Microsoft Support > Windows 7 Support, Windows Vista Support

Deleting prefetch folder

This is a discussion on Deleting prefetch folder within the Windows 7 Support, Windows Vista Support forums, part of the Tech Support Forum category. As part of some troubleshooting...I deleted my prefetch folder. It gets rid of corruption and resets the system. [OT-You'd be


Closed Thread
 
Thread Tools Search this Thread
Old 03-07-2010, 04:28 AM   #1
Registered Member
 
DrTeeth's Avatar
 
Join Date: Oct 2004
Posts: 25
OS: Win 7 (32&64bit); Linux Mint 11, PCLinuxOS, SuSE 11.4



As part of some troubleshooting...I deleted my prefetch folder. It gets rid of corruption and resets the system. [OT-You'd be amazed on how many XP systems it has failed to work slowing the system down - if on XP check out your own folder and the file dates there]. Anyway, this is a win7 system and does not exactly related to my prefetch issues.

As will all system folders, the prefetch one is recreated, but I am puzzled why this should trigger a reauthentication request.Any ideas?

DrT

__________________
DrTeeth is offline  
Old 03-07-2010, 09:08 AM   #2
Team Manager, Microsoft Support
Microsoft MVP
BSOD Kernel Dump Expert
 
jcgriff2's Avatar

Microsoft Most Valuable Professional
 
Join Date: Sep 2007
Location: BSOD CENTRAL
Posts: 30,552
OS: Windows 8.1, 7 + Windbg :)



Any app that you or the system runs will appear in \windows\prefetch

In Vista & Windows 7, prefetch = SuperFetch

jcgriff2 is offline  
Old 03-08-2010, 01:34 PM   #3
Registered Member
 
DrTeeth's Avatar
 
Join Date: Oct 2004
Posts: 25
OS: Win 7 (32&64bit); Linux Mint 11, PCLinuxOS, SuSE 11.4



"Any app that you or the system runs will appear in \windows\prefetch" does not seem to answer the question "why does deleting the prefetch folder trigger a reactivation request".

The prefetch folder exists on every win 7 system and it is that OS about which I asked.

TBH, what was the point of your post? If somebody asked you what the time is, do you reply "blue"?

DrT
__________________
DrTeeth is offline  
Old 03-08-2010, 02:42 PM   #4
Team Manager, Microsoft Support
Microsoft MVP
BSOD Kernel Dump Expert
 
jcgriff2's Avatar

Microsoft Most Valuable Professional
 
Join Date: Sep 2007
Location: BSOD CENTRAL
Posts: 30,552
OS: Windows 8.1, 7 + Windbg :)



Quote:
Originally Posted by DrTeeth View Post

TBH, what was the point of your post? If somebody asked you what the time is, do you reply "blue"?

DrT
Hi -

My apologies as I did not associate your troubleshooting method involving the deletion of the Prefetch directory and asking about a "reauthentication request" to be in any way associated with the Windows Genuine Advantage program (WGA) when I replied.

Are you speaking of WGA - activation or validation or both?

There are certain OS tasks that kick off that would cause the baloon pop-ups reminding you to activate the OS if you are running a full retail copy within either 3 or 30 days. Non-validation or non-genuine status leads to OS degredation. OEM versions are pre-activated/ validated.

Reduced Functionality mode --> http://support.microsoft.com/kb/925582

Office activation/ reduced functionality --> http://support.microsoft.com/kb/293151

It is of course your system and you are free to delete the Prefetch folder or any other you wish. However, I do not understand the reason for doing so in a healthy Windows 7 system or any system for that matter. If you don't want Superfetch to run, disable the system service named "sysmain" -
START | services.msc - disable SuperFetch

As for WGA - if you are prompted to activate or validate - go directly to the WGA and get the matter settled immediately.

WGA --> www.microsoft.com/genuine

I would also suggest the deployment of Windows Activation Technologies as it consists of activation and validation components that contain anti-piracy features.

Windows Activation Technologies --> http://support.microsoft.com/kb/971033

Regards. . .

jcgriff2

.
jcgriff2 is offline  
Old 03-08-2010, 03:01 PM   #5
Team Manager, Gaming
Team Manager, Microsoft Support
Team Manager, Hardware Team
Microsoft MVP
 
Wrench97's Avatar

Microsoft Most Valuable Professional
 
Join Date: May 2008
Location: S.E. Pennsylvania
Posts: 49,023
OS: Win7



The latest MS update has to do with Activation cracks, if it was hung in the prefetch folder or the activation code was in the prefetch fro some unknown reason that may have triggered it. Reactivation can be triggered by any number of things on Vista and Win7, though deleting the perfetch should not that I know of.
Wrench97 is online now  
Old 03-08-2010, 03:19 PM   #6
Microsoft-Team Manager
Hardware - Team Manager
 
joeten's Avatar
 
Join Date: Dec 2008
Location: Glasgow Scotland
Posts: 52,095
OS: win 7 pro/ultimate/xp vm



Hi what was the original problem that prompted your deletion of the prefetch,perhaps this could help us figure out what has happend
__________________









Eliminate all other factors, and the one which remains must be the truth.
joeten is offline  
Old 03-08-2010, 04:04 PM   #7
Registered Member
 
DrTeeth's Avatar
 
Join Date: Oct 2004
Posts: 25
OS: Win 7 (32&64bit); Linux Mint 11, PCLinuxOS, SuSE 11.4



Hi,

@jcgriff2. My apologies for my outburst.

I did not so much have a problem, just checking something out. The boot trace file (NTOSBOOT-B00DFAAD.pf) does not get updated at every boot as it did in XP or even more frequestly in Vista. Seems to happen once a month or longer.

If any of you chaps have access to an XP machine, just check the prefetch folder. There is a good change that the prefetch system is no longer working, the layout.ini file should be no older than 3 days and there should be entries with the current date and time. If not, it ain't working. The fix is not to delete the contents, but the folder itself. Like all system folders (recycle bin, IE cache etc) it will be recreated and fixed at the next boot. Deleting system folders can fix many things like a corrupt recycle bin...a broken prefetch system in XP is VERY common...most people do not keep an eye on their prefetch folder.

Still, deleting this folder meant I had to reactivate on the next boot. No biggie, but a very surprising consequence of my actions.

DrT
__________________
DrTeeth is offline  
Old 03-09-2010, 02:17 AM   #8
Team Manager, Microsoft Support
Microsoft MVP
BSOD Kernel Dump Expert
 
jcgriff2's Avatar

Microsoft Most Valuable Professional
 
Join Date: Sep 2007
Location: BSOD CENTRAL
Posts: 30,552
OS: Windows 8.1, 7 + Windbg :)



Hi DrT -

Interesting info about the layout.ini file. I looked inside it for the first time in ages. Mine has 6,417 lines in it and is ~ 36 hours old (last modified date) -
Code:
 Volume in drive C is Windows 7 x64
 Volume Serial Number is AEC1-A506

 Directory of C:\Windows\Prefetch

03/07/2010  20:32           809,050 Layout.ini
               1 File(s)        809,050 bytes
               0 Dir(s)  74,456,530,944 bytes free
  
 E O J     Tue 03/09/2010     5:07:18.86   
 E O J     Tue 03/09/2010     5:07:18.86    
 E O J     Tue 03/09/2010     5:07:18.86   
Here is the command if you wish to run the same -

START | type cmd.exe into the start search box | right-click on cmd.exe | select run as Administrator | paste the the following:
Code:
dir %windir%\prefetch\layout.ini /a > 0 & echo. >>0 & echo  E O J     %DATE%    %TIME%  >>0  & echo  E O J     %DATE%    %TIME%  >>0  & echo  E O J     %DATE%    %TIME%  >>0 & start notepad 0
 
A notepad will open with the results.

Is it just that particular file that you are deleting or the entire \windows\prefetech folder?

I went into the \windows\prefetch folder and deleted everything, including the "ReadyBoot" directory, re-booted my Windows 7 x64 system and did not have any issues re: activation or validation.

Regards. . .

jcgriff2

.

jcgriff2 is offline  
Closed Thread

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is on
Smilies are on
[IMG] code is on
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Post a Question


» Site Navigation
 > FAQ
  > 10.0.0.2


All times are GMT -7. The time now is 11:02 AM.


Copyright 2001 - 2014, Tech Support Forum

Windows 7 - Windows XP - Windows Vista - Trojan Removal - Spyware Removal - Virus Removal - Networking - Security - Top Web Hosts