my daughters pc has started playing up probably due to a virus
but i cant clean it with any virus programmes because it wont load anything on to it i've tried online scans but it wont let me on the sites
i cant get into the registry,when i open up security centre it just closes on its own

Hello garryuk

Do you have an anti-virus already installed and its not working or do you mean you don't have an anti-virus program and now cannot install one? Could you be more specific about the online scans as to what you mean by they "won't let me on the sites"?

Here are a few things you can try.

Download Firefox and then perform this online Virus scan:
Trend Micro Housecall Scan for Firefox

Download the following and save to your desktop:
Sysclean Package.
Virus Pattern Files (lptXXX.zip).

Download, install and update Ewido Anti-Spyware v4.0 but DO NOT perform any scans yet.
Print out the Ewido Install and Scan Instructions.

For the Sysclean Package do this:
1. Create a new folder on drive "C:\" ("C:\New Folder") and rename it Sysclean.
2. Place the sysclean.com inside that folder.
3. Extract the lptXXX.zip pattern file into the same folder you created for sysclean.com.
4. Close all open applications and DISABLE your current anti-virus software. Some anti-virus programs such as Avast will alert you to a virus attack when running sysclean so it's best to disable them first. If you don't have an anti-virus program, then skip this step.

Reboot in "SAFE MODE" and perform a scan with Ewido, again following the instructions you printed out for scanning in safe mode.

Then open the Sysclean folder and double-click on sysclean.com to run. It will take some time to complete. Be patient and let it clean whatever it finds.

Exit when done and reboot normally.