I'm running WinXP and, of late, my MS Security Essentials antimalware program often fails to start when I boot up. I've checked that the service in Windows actually runs at bootup and it does. The BITS service is also running, or at least that's what services.msc shows. I can fix it by stopping the msse service and then restarting it (running in automatic mode) but it's a fag to have to do that almost every time I boot the machine up.
Also, I always do my updates to Windows manually, and now at the WU website the latest updates have become unobtainable. WU shows them but when I try to look at the details of each one, I get:
Server Error 404 File or Directory Not Found.
Oddly, a few of last month's that I don't particularly want or need to have are available, as is also the latest Malicious Software checker.
I've done full scans of my machine with both MSSE and the monthly Malicious Software checker available via WU and it all seems okay.
Have I picked up a virus, or is this a case of MSSE and/or Windows having become corrupted? I did notice a 'funny' when I was downloading files from the WU website on the last occasion, that being that the Windows Firewall changed temporarily to Off halfway through one of the installs.
Googling for it has produced a whole mix of possible explanations. Luckily, I've a backup image of my system partition to revert to, if necessary.