Sounds like you may have a Virus. Download MalwareBytes http://download.cnet.com/Malwarebytes-Anti-Malware/3000-8022_4-10804572.html?part=dl-10804572&subj=dl&tag=button
- on another computer, load on a USB drive. Start your machine into Safe Mode (F8) and run Malwarebytes.exe from the USB Drive.
If you have Windows XP Pro, Rt Click on My Computer, Manage, Disk Management. You can view your current configuration. Possibly make changes. Additional helpful information from Microsoft - http://support.microsoft.com/kb/309000 You might also download SystemRescueCD - http://www.sysresccd.org/Download - Lynux boot disk. Run a program called GParted. This will allow you to totally control your partitions without upsetting your OS boot. A great tool we all can use.
cyrilleserra, It appears that at the moment Ifixit is out of stock on the front panel glass. The front panel glass on a 1st generation iPhone costs several times more than a 3G panel. Sorry they are not the same. Thanks