Installing S7 Simatic V55 sp3 from my external HD ended in a crash. Installing Simatic software is a.p.i.t.a. It takes hours and often ends premature with cryptic error messages Like: you have no sufficient rights to access ... the program you are just installing as administrator!.. Or invalid drive E: while you are installing from DVD drive F: ... Since installing from DVD station F: was terminated with error msg no access drive E: I thought to be smart and copied the install program to my USB drive 1T ADATA as drive E: This time the drive E: access error did not appear The install stopped in a crash anyway I was not surprised it is a Siematic install.. After that my USB HD was damaged no access possible Win Explorer freezes when trying to open ADATA CH94 (E:) that was now renamed to E: only the message: drive E: has to be reformatted to use it.. That would mean complete data loss 350 GB of 931GB ooops Googeling I hit on using chkdsk /
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