I encountered this problem when trying to install the usb drivers for a Huawei MT841 modem. Now I am getting this error when trying to use Add/Remove Software. Googling indicates that this could be due to: 1) Virus 2) Damaged/deleted newdev.dll caused by software installation/uninstallation Remedies suggested: 1) Uninstall IE8, get latest IE8 Installer, reinstall IE8 2) SFC /ScanNow 3) “The safest method to fix Newdev.dll error is to make a complete scan for your poorly maintained system with a trustworthy Newdev.dll error repair tool on your computer. It is specifically designed to ensure you a thorough scan and repair for the system which has been mostly ruined by Newdev.dll error and other frustrating system problems with its ultra powerful and advanced PC error detection tools.” Any feedback/suggestions would be greatly appreciated. I have a fully updated XP SP3.