Record and Play

I am a french and an user of Audacity for several years and the version 2.0.3 Windows 7
I meet for some time a problem of sound, in l recording BY INTERMITENCE;
When j ’ listen to a recorded file known a track, the sound is sometimes completely filled with crackle. It looks like the track is désyncronisée.
It is inaudible and unusable.
I specify that is by intermitence but regularly.
J verified the update of my sound card.
J ignores d or can come this problem. J need your help(assistant).
Thank you for advance.

PS Sorry for my english

Unfortunately there can be many reasons for this sort of problem. Please see here for some suggestions: