Logging in on my T500 2055-A77 takes a pretty long time.
The Start bar takes a while to load. My system has 4GB RAM in it and I have only 18 GB of hard drive space left in the 100 GB drive, which was migrated over from an older T61 model. I also cannot watch videos being streamed online.
I have yet to configure the 160GB T500 drive.
You are running out of drive space.
Try to run a disk clean-up and defragmentation.
To deal with the issue of space, clone the 100GB drive which you had taken from the older T61 over to the larger capacity T500 drive.