Backup your electrum data directory on PC1. You can find it by doing the following:
Go to Start -> Run (or press WinKey+R) and run this:
explorer %APPDATA%\Electrum
Usually this means:
C:\Users\YourUserName\Appdata\Roaming\Electrum
Backup that entire folder and copy it to the same relative location on PC2. See if electrum starts up on PC2 and you can see your balance.
Sorry for not getting back sooner....
Anyway, I tried this, and I encounter the exact same problem when I do this. Electrum fails to start up on PC2.
I swap back the Electrum folder that PC2 originally has, and Electrum opens - but that doesn't help, as my coins are in my PC1 folder.
What's the next step for me to try? Thanks