My Windows Installer recently stopped working and I have downloaded
“WindowsInstaller-KB893803-v2-x86″ when attempting to run it, it gives me the
message “setup could not verify the integrity of the file update.inf. Make
sure the Cryptographic service is running on this computer.”

It might be caused by a bug made on Windows XP SP1. I have already attempted cryptographic service fix (xp_cryptofix) but still didn’t allows the windows installer to succeed. I tried system restore but
all I got was “system restore is not able to protect your computer. Please restart your computer, and then run system restore again” but restart yielded the same message.

 Last and helpful, I use this Dial-a-fix software. Try to run this software and I hope you make it ^^.