If by "restore" disks you mean the destructive restore disk provided by the computer manufacturer to return the PC to the condition it was in when new, ie - Your operating system, software bundle, drivers, etc, then using it would do exactly that. Actually, that's what should have been used in the first place. The manufacturer's restore disk came with the correct drivers for your video card, sound card, manufacturer's proprietary software, etc, which a generic new Windows install disk may not have.
If you have added hardware since your computer was new you would have to provide the drivers for it - reinstall the software that came with it.
Also, you would need to update from whatever state the original op system came with (like SP1 to SP2 for example) and reinstall whatever software you have added since you got the computer.
Before you connect to the net make sure your firewall is enabled. It was not enabled by default until SP2 for XP, and make sure your anti-virus program is in place and operating.
Edited by Enthusiast, 06 February 2006 - 02:28 AM.