يا باشا هتجيلك ازاى هو انت عملتها اصلا :)
الخطوات اهى
Run Registry Editor (type regedit in Start Search or Run dialog box and press enter) and navigate to- HKEY_CLASSES_ROOT\Installer\UpgradeCodes
2. Take the first part of GUID and reverse it, in my case it is AA4A4B2C and its reverse string is C2B4A4AA. Now search for C2B4A4AA and you’ll get a match than delete the its parent subkey (it will be a kind of GUID without braces
افتح قائمه Start واكتب فيها
regedit
HKEY_CLASSES_ROOT
وكمل باقى الخطوات زى ما الراجل كان كاتبلك فوق ^^