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DNSCACHE/Win7 Disabled - Expect Problems?

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Have disabled DNSCACHEing(actually disabled DNS Client) for a reason - what problems can I expect?

Reason: when (1) Internet (from modem via hardwired to router) was reconnected - or - (2) the PC was idle long enough to 'go to sleep' then was 'restarted' ... there was a 2 - 3 minute delay before a URL could be 'processed' (via Firefox) or email (WLM) could be synced. After using Win System Monitor and SysInternals,it boiled down to an svchost.exe which 'called' DNSCACHE (and others) .... but it was dnscache taking 50% of CPU and 'not letting FF complete".

I was advised to disable the dnscacheing ... which worked.

Subsequently,I've set up a homegroup to share things (printer, documents, etc) with wife's laptop. Had trouble setting it up (was due to PCTOOLS Firewall Plus - worked when removed) but in troubleshooting, saw a caveat from M$ that DNS Client should be enabled.

Have tested (a little) and sharing from laptop works whether dnscache is disabled or not.

My question is: have I just been fortunate so far and what can I expect in the future?
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