Don't anyone throw a brick at me, but I'm willing to bet it is your video card drivers.
With your system you should not have to tweak anything. You might have trouble recording video in LOD 1 while moving.... but you can adjust anything as much as you'd want with hardly a whine out of your machine. See my specs below to compare.
I might also suggest modifying your virtual memory settings manually instead of allowing windows to set it. I only have 2GB of installed physical memory, so I set my Page File Space up to allocate 9GB of room on my hard-drive to be set aside. I think it is in Control Panel, Performance Information and Tools, Advanced Tools, Adjust the appearance and performance of Windows, Advanced Tab, and under Virtual Memory press the "Change" button. In the next window that pops up make sure "Automatically manage paging file sizes for all drives" is NOT selected. Then hit the "Custom" check box and enter numbers for an initial size (I said 4GB) and maximum size (I said 9GB) and press "Set". System managed size and No Paging File should not be selected.
Even though windows recommends only 3GB of space I am currently using 6GB. Windows will use space on your hard drive as if it were RAM. A Solid State drive will NOT appreciate you doing this, they are not the same as memory chips, so the risk is yours.
Then update your video drivers, just because.
By the way, I ran into the same issue. My motherboard's BIOS only supports a max of 2 GB of RAM, but I found a hacked BIOS which takes up to 4 GB (although only 3.3 GB of it can be used, even in a 64-bit OS, which I'm not going to do.) I thought having a huge page file would help so I cleared 8 GB on my HD to use as a page file but the dang thing is so slow it doesn't even matter. And flash makes me blue screen if it tries to access memory that has already been swapped so I just disabled flash- don't want it don't need it. I am ordering the GT 730 (just trying to decide between which version to get) and Crucial 4 GB dual channel memory. I have a dual display set up and since the GT 730 I was looking at only has one DVI port, I'm also likely getting an HDMI to DVI adapter.
I have Win XP x32 Home but likely going to upgrade to Win 10 x32 Home or run a dual boot system. I already bought the OS and a 2 TB HD.
My motherboard limitations are 2 GB RAM (but 4 GB with hacked bios- actually 3.3 GB), and it won't take anything more recent than PCI-e 2.0 and I won't buy used electronics stuff because you don't get a warranty with that. That's why I settled on the GT 730 I just need to decide which version to get, and I'm getting the 4 GB memory and the HDMI to DVI adapter.