audacity problem high cpu use (100%)

Hello …
First of all i apologise for my english…
I have one problem with audacity…Almost everytime i export a wav song…from a wav Mix(1 hour) and i cut a part of it
when i open the folder which contains files from audacity (Cut) i see a green line on the top of the folder means that my cpu cant read the type of song…And then cpu goes full and i cant delete the song and i have to restart laptop…IF i restart and open the folder again this happens again…
Can some1 helps me what to do for fix this problem?
System windows 7 64bit,intel i7

Does this happen only with Audacity 2.2.1 RC2, or does it also happen with Audacity 2.2.0?
(Please also read the pink panel at the top of the page)

i use the version 2.2.0 i think is the last version…i dont use rc2
i will search the other answers…but if you know something please tell me…!

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