"Gerry" wrote:

Ken

How much RAM memory?

OP stated: "Four out of five days / week, it's just fine. Then all of
a sudden it is sluggish all day long and fine the next day."

Why would RAM only have a bad effect every fifth day?

I would be interested in seeing a Disk Defragmenter report.

OP stated: "Four out of five days / week, it's just fine. Then all of
a sudden it is sluggish all day long and fine the next day."

Why would a fragmentation problem only have a bad effect every fifth
day?