W32.Silly is a worm that spreads through network shares and infects all files in the infected computer. It also download other threats from remote sites and executes them.

W32.Silly disables security software.
 W32.Silly and its family can

• Disable Windows AutoUpdate feature.
• Infect Non-executable Files only.

Because this is a worm, pc tools spyware doctor is not the appropriate tool to remove it. However, PC Tools has another product suitable for this job which is "Spyware Doctor with Antivirus" that should do the trick. You can download this software here: SD w/antivirus. Important: Immediately  after you install Spyware Doctor with Antivirus, do the following:

1. Temporarily Disable System Restore (Windows Me/XP).

2. Update the virus definitions.

3. Reboot computer in SafeMode

4. Run a full system scan to clean and delete all W32.Silly (and variants) infected files

Wishing you the best!