Further to: Every time I try to connect to the App Store on my iMac, my modem crashes. My internet works otherwise okay.

My virus scan turned up nothing.
I have confirmed the modem crash only occurs when I try to access the App Store via my iMac.
Also, a Macbook Air also on the same WiFi system does exactly the same thing.
The Internet runs perfectly otherwise, except when trying to access the App Store.
The Modem is a Siemens SpeedStream 4200-Series, operating in Bridge mode.
The WiFi is an Apple Airport Extreme.
FRUSTRATING !!!
(Couldn't figure out how to add this new information to my previous post)

Disable your anti virus software then try the App Store.

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Hey thatssoivi,
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iTunes for Windows: iTunes Store connection troubleshooting - Apple Support
Thanks for using Apple Support Communities.
Be well,
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Further to: Every time I try to connect to the App Store on my iMac, my modem crashes. My internet works otherwise okay.

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