I'm running XP; my computer is AMD Sempron 2200+, 1.49GHz and 768mb RAM. I do not have SP2 installed anymore, I removed it last week in my quest of getting my computer to be nice to me. I've got Comodo as my firewall, and AVG as my virus thingie.
It's not too slow to shut down, but reboot can take anywhere from 3 to 20 minutes, but most take about 15 minutes. The 3 minute reboots usually happen a few times after I've tweaked something, then it goes back to its old behaviour. This is frustrating, because I always think I've got it fixed, and then I realize that it is not fixed at all! Accessing programs are slow initially, but if they've been opened and closed once, they open with normal speed. Also, if I leave my computer unattended for six or more hours, everything is slow again.
To try and fix the computer, I've run the following programs:
AVG Anti-Spyware (in safe mode)
Dr. Web Cure-it
Symantec (since uninstalled to put AVG in)
System Mechanic (since deleted)
My computer is squeaky clean! Besides running the programs, I've also:
Checked and changed startup programs and services by using online references
Checked to make sure there are no open ports or shared stuff going on
Uninstalled programs which hadn't been used in awhile
Fixed the registry
Did a system restore
Thinking that my system was overheating because of what Speedfan was saying, I rigged up a room fan to cool off the opened computer, which gave me two days of three minute reboots and instant program access. Then again, a lot of the above mentioned things did that, including removing SP2. There's no CPU bottlenecking, either.
Please, can someone help me? I've been working on this for over a month and my brain hurts!