dr watson portermen debugger!?

hello, ive had this problem for a while now, but i really need to fix it. i have a good anti virus system and i do regular scans, although ive had this dr watson thing, not quite sure what it is. when i go into my documents it will not let me delete, copy or move files. it will let me drag and drop and will let me right click archives but when i try to right click any folders or files in my documents or any other folders, ev3en if i click an icon at the side, or press del or ctrl copy on my keyboard. it comes up with the dialog box that says windows has encounterd a problem etc, then if i wait a while it comes up with the same dialog box that reads dr watson portermen debugger (or something like that) has encounterd a problem and needs to close. i then have to do ctrl alt del to get my computer unfrozen. i cant really install any software that gets rid of this beacsue i hardly have any room left on my hardrive- beacasue i cannot delete things. i have gone through many websites looking at how to solve this problem, but im only 15 and dont understand any of it! so what i need is a simple way to get rid of the virus:(
please help, many thanks!

what antivirus software do you have on the machine?
also just how much space do you have left on the drive?

my antivirus software is bullguard
and i have 1.84gb left

there is no way the machine will run with just that amount of free space. Thats why you are getting the crashes, and why Dr Watson is kicking in
You need to delete superfluous stuff from the machine
If you boot to safe mode (hit the F8 key on startup and select "safe mode" from the menu) you should be able to access the hard drive and delete the junk. Presumably stuff you've downloaded?? You need to try to get the machine to a point where at least 40% is free.
There may well be more problems with viruses as well, but you need to start here
Otherwise, time to request paid help

Just for information - Dr Watson debugger is part of Windows, it kicks in when Windows has a problem to try and fix/find the cause. It is not a virus.