Major office and IE problems after trojan. HELP!!

Hi all...Last week I had a problem with Internet Explorer 6. After being online all week I closed the pc down friday night and went to bed. When I started my system up the following morning I could connect successfully to the net but could not fully open any web pages at all. I only got a white screen and the cursor hourglass. Waited ages and nothing would open. Now normally when this happens(it has in the past due to spyware etc) I do a scan with Avast, spybot s&d and adaware personal SE and then get onto google to find out how to remove the nasty that these have found if they cant do it themselves. Due to explorer nbot working at all and a week of stuffing about for many hours a friend gave me a copy of the Mozill Firefox Browser. Bingo!! ..now at least I can see web pages!!. But...since I have installed and am using Firefox every time I get an email with a .pps or word doc, excel..etc..any office program type file (I am running MS office pro 2003 and XP SP2)i get windows installer popping up saying it needs to install some update so the program can view whatever it is im trying to open but always comes up with an error saying it cant find this CAB file or that (varies..have tried this about 20 times today)and to point it in the direction of the file. I checked my CD and the damn files its asking for are on the bloody cd!! (can you tell Im nearing the end of my tether here!!??) but it doesnt recognise them and wont proceed. I have tried uninstalling (which wont work due to the same error) or reinstalling (with the same result) I have visited hundreds of forums today seeking guidance to no avail. It seems every thing microsoft has been affected (suprise suprise!!) by this damn trojan. BTW..the trojan was Win32.Trojan.gen{Delphi} and also found Win32.1stbar_L which Avast seems to have removed but I have doubts. I have attatched a Hijack This Log for anyone who wants to view in case it helps.

Edit: Deleted unrequested inline log file

Can anyone give me guidance here!!??
Drgrim

 

since this is MALWARE problem then
you go in this section

For better assistance in that section try to follow this
READ & RUN ME FIRST Before Asking for Support

BTW, Welcome aboard to the headquarters

infoseeker

 

Ok..thanks for steering me to the "Read me first before asking for support" section.
I have followed all the steps in that and found nothing..at all. The only steps I couldnt follow were the online scanning options as they will only work in IE and I cant use IE or any other Microsoft browser or program. I figure the trojan I had damaged something and specifically attacked the microsoft software on my pc. I have absolutely no sign of any malware at all now but still have the problems with my software..(which is why I posted here) . I cant reinstall anything as I keep getting the error message saying windows installer cant find the "......CAB" file even thought I point it to the relevant file on my installation cd which I can open but it cant.
I still cant use any program from Microsoft Office at all or do anything with Internet explorer..including update or download the latest as I have to be using IE to downlaod IE( or so I am told at the web page). If I could use it then I wouldnt need to download it!!!
So!!....anyone have any Ideas as to where to start???
Drgrim