Hi & thanks in advance. Running Vista Home Premium & Microsoft Security Essentials (will call it MSE). 4 days ago: I was researching the possible value of some comic books and obviously hit a bad site. I will do my best to write here all the exact messages I've received since then, but there are many and I was only able to jot down a few, so if you need more specifics on a particular error message let me know and I'll try my best. First, MSE popped up - "MSE detected 1 potential threat and suspended it. Click 'clean computer' to remove this threat." I did so. I shut down for several hours, came back to work on some things. On start-up got "Failed to connect to windows service" (again, there may have been more to this message I couldn't jot down??) About 2 hours later - "Host process for windows services stopped working and was closed. A problem caused..." At this point I decided a problem existed and did some basics - disk cleanup, MSE scan & Malwarebytes scan. MWB found 29 issues (!) The trojan word popped up in there a few times...so I let MWB clean all that. Did another scan with both. Nothing found. Started my puter the next morning - "Security Advisor has found suspicious activiy on you PC" MSE found another threat, which I cleaned. I did a little work (on ebay, etc) and got MSE detected 1 potential threat...." again. Went to click on it (lower right) and the icon went away before I could! I could not find MSE in programs either, did search, found it, clicked on it and got: Windows has (either found, encountered or...) a problem and will close in one minute. Please save all work" Then it went to a black screen for about 10 min. I did a long press on power button since nothing else seemed to work. It shut down, rebooted itself and went to black screen again. VERY frustrated by now so unplugged the damned thing. Waited, replugged. Went to safe mode screen, I picked "Safe" mode. It then went to a black screen with "Safe Mode" in four corners. Oh, and somewhere during all this I read, while investigating this mess, to check my Event Log. I followed the directions and pulled it up. Lots of red (!)'s from that day (4 days ago) but no red X's. there were three red X's but from long ago...if that helps. Now today -- I decided to try booting it up again. It started to boot fine, welcome screen, then black screen. Restarted and f8'd - it is now at "Advanced Boot Options" screen with a dozen or so options. I don't want to touch it without advice. Thanks.