Okay. Basically, sometimes when something attempts to write to either my DVD-RW drive, USB removable storage devices, or the SD card reader, my laptop will freeze (completely, mouse pointer and all) or start going very slow, and almost always the write speed is incredibly slow. I use all of these things a lot, often at the same time! So this is a huge problem!
For example, I burned a DVD yesterday (selected 8x speed) and it burned at an average of 0.6x, or about 700 KB/s. It took 30 minutes to burn slightly over one gigabyte of data! The resulting disc also appears to be slightly screwed, as it skips a lot when played back in my DVD player.
It also occasionally happens for no particular reason, or when I copy/move files on the hard drive, but it's much less common when I'm not using the disc drive, a USB drive or the SD card reader.
When it happens, a process shows up in the task manager called "Interrupts" (Description: Hardware Interrupts) and uses up almost 100% of the CPU. This just baffles me.
It's an Acer Aspire 3100 with a Mobile AMD Sempron 3200+ and 1 GB of RAM. Help.
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If it's not that it's likely the laptop itself, which would need to be repaired. The good news is that if it's not a virus or something, your data is likely still intact and should be quickly backed up.
My warranty expires soon so I guess I should go ahead and call and get a repair, unless I can find a solution quick.