Hi Paul,
no I'm a happy regular customer (I hope at least ,as long as you receive my envelope 😀 ),and the prob shouldn't be related to GliDos:it runs fine TR-UB and Redguard (as I said only prob is scratchy sound during TR fmv,and low quality voice reproduction in Redguard 😢 ).
I have downloaded this tomb.exe file from the link in this forum and for some reason it refuses to be deleted even if I am not running GliDos or TR! Further ,I noticed that I can't remove the files in my temporary internet folder too ... 😕
In the meanwhile I scanned my system with etrust ez antivirus and discovered that there are actually some files infected and others which couldn't be scanned (what does this last thing mean?),so being not really a "techie" person in the next few days I'll try to get some more help 😖 around here.
Thx!