[SOLVED] ISDone.dll error does not match checksum...unarc error code -12

Mar 8, 2018
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Guys,for couple of days i have not been able to install some games on my computer due to the "ISDone.dll error does not match checksum...unarc error code -12" error popping up every time during the installation.Surprisingly, i was able to install one of the games 3 weeks ago..on the same computer..now i cannot even install that particular game.
I checked in internet for a solution and found out that it's a Ram or HDD issue..so could someone please clarify what's causing the problem?
 

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