My windows user 7gigabytes big + other suspiciously big files

c:\users\Wim <<my name
It was 7+ gygabite.
I cleaned it a bit, and reduced it to 2.6 gyg (google chrome was 1.1 gyg :mad:, a bunch of cache and other temp stuff) But now there is still 2 gygs of appdata in there. Mainly microsoft with the folder "explorer" and temp internet files. + 0.5 gyg for a folder 'virtualstore'. Been cleaning for more than an hour now. And i'm wondering. What if i just remove this user and create myself again?
Assuming i backup my documents & desktop. I don't loose anything that i actually care about, do I? (Except software that is installed 'for this user only' like chrome automatically is..)

Part 2: hiberfil.sys & pagefile.sys
If i understand id right, hiberfil contains the needed information when you put your computer in hibernate, so it awakens correctly. I tried the suggestion with "powercfg.exe /hibernate off" from What are HIBERFIL. SYS and PAGEFILE. SYS?
But the file is still there, would it be safe to delete it manually?

Pagefile.sys is like the virutal memory? With me it's 3.4gyg. If it realy is the virtual memory, does it HAS to be 3.5gyg? That looks like... much.?

There are many applications that store data inside the user's profile folder. Some can be changed by configuring the applications, but this is rarely done. It's possible to backup data, create a new temporary user, delete the old one and recreate it with the same name (it's not enough to delete the folder in C:\Users, it must be done from the control panel), but this will cause some anoying problems with applications installed only for that user and some other configurations, and sooner or later you will have again your user profile full of data. So I think it does not worth to recreate the user. Anyway, if you decide to recreate the user, be sure you do not have any encrypted files using Windows EFS or you will lose them when you delete the actual user.

If hibernation is disabled you can delete the hiberfil.sys file. The pagefile.sys usually have 1.5 times the size of the physical memory, so you might have 2GB of RAM. This is the recommended size and I wouldn't change it unless you know exactly what you are doing...