How to fix low memory on Windows 7? I have 4gb.
4GB is plenty for Win7, enough for 64-bit as well. Windows 7 and 8 reserve memory for fast app booting (caches files to ram). Unless you're having performance issues and notifications I wouldn't be worried. Games are the only resource hogs that need alot of ram, but on most cases 4gb is enough.
If you have issues such as warnings from Windows check that your hard drive is not full and if there's room there's a possibility some program is faulty and eats all the memory.
Before purchasing more memory, you should try changing the paging file size to about 6072MB and see if it helps. I would also check to see what programs are running in the background that could be exited or stopped.
If you could answer Oron's questions, it would help narrow down the possible cause and suggested fixes.
You need to purchase and install more memory on your system. Read the documentation for your motherboard to determine what type of memory that is compatible with your system. You can also run the Crucial Memory Scanner (software) which will tell you what you need as well.
4GB is plenty for many users, but there are of course those who need more, so it could be that you need more memory, that something is wrong with your PC or with the Windows configuration or that you are doing something that would trigger the message (e.g. opening 30 tabs in Chrome)
Can you clarify a) when you get the low memory message and b) what he message actually says?
is it 32bit or 64bit?
what do you see when you open task manager.
do you have the same problem when you boot windows 7 in clean mode?
perhaps you have some malware or some process/service remaining because unistall not complete.