Hi...

to the CPU issue:

How many files are you two sharing?

What are your download settings on "Total parallel downloads" and "Max downloads per file"

Usually these values influence CPU usage very much.

to the download issue:
Can you check in the task manager how many threads Phex uses when it downloads normaly and how many it uses when it stops downloading.
Also can you look into your phex.error.log file if there are any error messages during the time Phex stops downloading.

Gregor

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