When I try to upate it looks like its working but then i get a "Themida internal error"

[Forex Trader]

As in the subject I try to do an update to MT4, current version Build 218. It starts to do the update but then i'm presented with the following:-

"An internal exception occured (Address: 0x81fc10) Please contact [e-mail]. Thank you"

At this point I can no longer open MT4.

I am running this on a VPS Windows 2003.

Can anyone please help?