Quote:
Originally Posted by DNSB
The 2503 error during an install is most often triggered by rights issues on the Temp folder.
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It can be. It's more often triggered by failed synchronization of MSI (the Microsoft Installer, a part of Windows — and the program that actually does upgrades for Calibre, Office, and many other Windows executables). Fortunately, resynching is relatively easy, but it does involve a reboot.
Close all programs (that means the browser, too, so you're going to want to copy the following down first!). Open a command line in administrator mode (Win-S, search for "command," select "run as administrator"). Then type the following two commands:
Code:
msiexec /unreg
msiexec /regserver
then reboot.
This fixes the problem about 90-95% of the time, even when it's a TEMP folder permissions issue. Until the next time it gets out of synch... which is virtually guaranteed when there's a feature update, like 25H2 in about three months...