Right mate ive found this on how to restore your laptop, just follow the instructions it easy to do, then make sure you install an anti virus when it up and running again.
Who is your internet provider as usually they give you antivirus for free.
Your Advent computer uses the latestrecovery system that doesn't require any CDs or DVDs to restore your PC to it's original factory condition. 1) Restart your Computer. 2) Press F10 repeatedly until the message "StartingSystem Recovery" is displayed. 3) The recovery will load and display a menu of options: (a) Non-destructive recovery: this option will restore Windows, supplied applications, and drivers. This option will not destroy your documents or programs. These will be backed up along with the registry. These are restored at the end of the recovery process. To access the recovery options below that erase all data from the computer, click the Advanced button. (b) System Recovery - No format: this will reinstall Windows®, supplied applications and drivers. It will move your files to a folder called "My old disk structure". Any applications (except those supplied) will need to be reinstalled. © System Recovery - Quick format: this option will erase your hard drive including your personal files. Windows, supplied applications and drivers will be reinstalled. 4) Select the Non-destructive recovery option and press Next. 5) You will be informed about System Restore in Windows, click Yes. 6) The recovery will begin. Once this is complete clickRestart.