Windows 7: Memory blocking while downloading large data files

Hello I have a "little" problem.
When i start downloading large data files with multiple connections (it does not matter which download manager i use - flash get, jdownloader, IDM) it starts to consume a lot of MB until it consumes all of it, but when i close the download manager only about 200 MB becomes free (before downloading started i had used only 900/2048 MB and after closing download manager, it is used ~1800 MB / 2048 MB and there is no program in task manager which would consume such a lot of memory and i can free the ram only by restarting computer. This happens to me on celan RC version and even on clean RTM version.
I have quite a fast conenction 50/50 Mbps so the RAM runs out quite fast (in 15 minutes i have no free ram).
This happens only in Windows 7 (in Vista, XP it downloads without any memory leak using the same download managers)

Does anyone have the same problem or know how to solve it?
THX



//EDIT: I have 32bit systems; see My System Specs under this post to view HW ane please vote only if you are downloading in Windows 7
//EDIT2: Problem solved - since i uninstalled nod32, i have had no memory issues

Well lets start with is ot 32bit? when this happens what does the process tab in task manager say is using the memory? to open task mgr rightclick taskbar.

Ken

Thats what is most weird. Task manager shows that the program uses only about 200MB - the aoumnt of ram that releases after closing the program. There is NO process in task manager that would consume such a lot of RAM.
I have 32bit version btw

Tomorrow, when my rs account lets me download again, i will post screenshot of taskmanager before and after downloading

You can use the snipping tool in win 7 (type snipping in search) and attach them to your reply with the icon shaped like a paperclip. do the process and performance tabs

KEN

You have not decribed a problem. You seem to indicate that no single process is consuming an undue amount of RAM. You seem to be describing normal Windows memory management.

We shall see.

I am descibing that no process in task manager is consuming such a large amount of ram ( at least task manager doesn't show any RAM consuming process and yes i selected show process of all users)but the ram is stil used by something i mean after downloading i have 1800/2000 MB used or even more. Thats not normal and the system is then slowed down as it swapps

Just wait for tomorrow i will post screens before and after downloading

So here are screenshots. I could download only 5GB today so the RAM was not comnpletely full, but still something consumes a lot of it.

Before2,Before3.png are screens from before starting jdownloader
During1,During2.png - during downloading
Before Closing1,2 - after download finished (after i exceeded rapidshare download limit for today) before closing jdownloader
after closing1,2 - after i closed jdownloader - here you can see that somethings consumes a lot of RAM but it is not shown in task manager

Any ideas?