Network Store Interface Service leaking memory

Hi all,

So the issue I'm having started occurring in July this year and it is this: after leaving my PC running for about 3-4 days without a reboot, I noticed that one of the svchost.exe processes was hogging a large amount of memory (about 2,4GB). Using the instructions fromthis page I separated out the services running under this single process into separate svchost processes, rebooted and left my PC on for another 3 days.

The same symptoms occurred in terms of high memory usage and the offending service is called "nsi" or Network Store Interface.

I've been troubleshooting this issue for a while now and am not sure how to tell what is causing this service to consume such high memory. If anyone can help me solve this I'd be grateful.

My PC's spec:

Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 7 Professional, Service Pack 1, 64 bit
Processor: AMD Athlon(tm) II X4 620 Processor, AMD64 Family 16 Model 5 Stepping 2
Processor Count: 4
RAM: 4095 Mb
Graphics Card: AMD Radeon HD 7800 Series, -2048 Mb
Hard Drives: C: Total - 241326 MB, Free - 84060 MB; D: Total - 476937 MB, Free - 401302 MB; E: Total - 78159 MB, Free - 67740 MB;
Motherboard: ASUSTeK Computer INC., M2N68-AM SE2
Antivirus: Microsoft Security Essentials, Updated and Enabled

I've attached screenshots of the process and service.

This is my first post so let me know any info that I've left out which would be useful.

Regards,
Liam

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