system mechanic pro 17 turn off virus protection

Also have iolo running on win 7 64 for many years. If your OS has been install for a long time, you should defrag your harddrive, and delete as much as Aplication that you don't use, specially virus protection Apps, too much proctection Apps may slow down you PC, or you can look for better virus scan to scan your PC for virus. the last thing i can think of is that it may be related to my power supply except that it's relatively new so. my computer is now rarely even getting to the windows login screen. i've done everything i can think of and the problems have gotten progessivly worse. finally i've removed the dust from the inside of the computer. i've used 'system mechanic' to perform tasks such as defragmenting the harddrives, compacting the registy, removing temporary files, fixing system flaws, etc. I've emptied the precache, run various virus scans and removed all virus/adware using up-to-date virus software. i have to turn the power off at the wall and wait five minutes to turn the computer back on. whenever it is restarted it will shutdown to a point where the hard drive light stays on and the monitor turns off and won't come back on. finally, i am unable to restart my computer. if i run a program it will sometimes freeze. pressing the 'start button' takes a very long time. whenever i am able to login it takes about 4 minutes for the windows screen with icons and taskbar to show up. sometimes the computer will simply freeze with the harddrive light staying on solid without blinking while it's booting up and the monitor will turn off. Whenever i turn my computer on it takes around 10-15 minutes to reach the windows login screen. Windows XP Professional - Completely up-to-date (service pack 2, weekly updates, etc.), dual 1.2 ghz athlon processors, radeon pro graphics, 256 SD ram, one 60 gb harddrive with 53 gb used and one 80 gb harddrive with 45 gb used, i'm not on a network

System mechanic pro 17 turn off virus protection