vWokspace Windows Connector 7.6 (pntsc.exe) spikes CPU to 100%

I'm experiencing an high CPU use in (pntsc.exe).

In a ThinClient Wyse C09LE7 (VIA ULV 1GHz processors) with WES 7 spikes CPU to 100% periodically. At this peaks, I/O and user experience is very slow. Access from mstsc.exe it's ok.

In better CPU's use is very high but the user experience is optimal.