Posted 28 February 2011 - 10:45 AM
I'm new to the forum, and although I've been doing programming for many years, operating systems are not my forte'.
Recently I upgraded a PC at home from Vista to Windows 7. All seemed to work fine for several days. I have Norton 360 and regularly update.
But then programs would freeze during loading. It can be any program, from IE8 to Chrome, to Windows Explorer or Solitaire. I might get just the splash screen or a blank screen or nothing at all. After that NOTHING will load, including Task Manager. But windows already loaded will continue to work. Thinking it might be an IE bug, diagnostics I run say that Data Execution Protection is turned off. Turning it on doesn't seem to "take" permanently, even doing it for all programs in Windows Control Panel.
When I log out, I always get a screen that the listed programs aren't shutting down asking if it should be forced. If I do nothing, after a few seconds the message will disappear and continue the shutdown. Sometimes it has listed one or more programs I tried to run, but sometimes *no* program will be listed above the message.
Runnning in Safe Mode with Internet Access, everything will run just fine. I disabled every IE add-in and every start up process that I was sure I didn't need. I ran Malwarebytes and Norton 360 both in safe mode and regular Windows mode and they reported no problems. Other online scanners also reported no problems. I took off Norton 360 thinking that might be interfering with load up but that didn't help.
I started running Task Manager when I first got into Windows and it usually loaded, but its display seems "frozen", with CPU usage at about 90% and idle time at over 95%. The CPU usage bar is all green.
Process Explorer gave me more information, but after I ran it a couple of times, the Process Name column at the left disappeared, even though it isn't a hideable column.
I don't know if it's relevant, but Media Center won't play files it has cataloged itself, saying they don't exist.
Any thoughts about what I should try next? If this is a virus, it's 10 times more sophisticated than any I've ever run across before.