hardware: dell D630, with 3G RAM
host OS:Windows 7 pro
guest OS:Windows XP sp3
I met this problem when I upgraded from 3.0.12 to 3.1.0 or 3.1.2.
I have been using the guest XP in the past year, without reinstall. First host OS is Vista, then the Win7. And I kept my virtualbox version as new as possible. Despite some minor problems, they worked perfectly.
When I upgrade from 3.0.12 to 3.1.0(including addition), it was ok at first. But, whenever I started up my MS word, opened some documents, edited for a while, the cpu ran to 100% in both guest and host, and wouldn't come back.
so, I rolled back to 3.0.12, It worked normally again, but MS office (including word and excel) lost response for a while during opening and saving action. I think it has something to do with the downgrade and shared folder, but it's not a very big problem.
Today, I upgrade to 3.1.2. The MS office seems ok. But, when I opened the IE6, and logged into my bank to check my balance. the CPU load ran to 100%, whenever I perform the same task(I have uploaded an pic to indicate the exact step causing the problem). The guest and host kept the 100% load for a long time. Sometime, the load will go back to normal, but the guset XP system become unstable, host is not affacted.
No matter I checked 3D and 2D acceleration or not, the result is the same. The problem has nothing to do with the guest window mode either.
Now, I think it maybe caused by the certification for the bank installed in the IE. Is it possible?