My touchscreen is used to work fine but since i messed up with driver touchscreen doesn't response.

It is a worcol usb touchkit. Worcol usb touchkit driver was installed. I tried to uninstall and reinstall driver and after first uninstallation touchscreen didn't work at all.
I have been trying any possible way to get it work (except reinstalling windows). If i try to uninstall the worcol software, install shell appears for a second and ask me for reboot but uninstall shell doesn't remove anything. Same result with add/remove programs. When i try to install it, the same window shows up again and start uninstallation again. After a second ask for reboot. I can install driver by add/remove hardware but it doesn't help too.
I removed anything about worcol and touch by searching for these two phrases.
Same result. I don't know what to do. I know that it is a stupid windows unknown bug. btw my xp is up to date.
Any idea?