It all depends on the user if any of those work. I had a user way back (no longer in support) that had a bad 123 spreadsheet and swore that it was something we did to it on the network. Because it worked yesterday.
We attempted all the tools at our disposal to recover the file, including restoring from backups (when back 3 gen's) and it was still broke.
We tried to explain that it couldn't of work the day before because it was bad on all our backups. She screamed so loud that her boss came out - believed her - went to our boss - which in turn bitch us out. We had to write a report on what had happened to her spreadsheet ... gee we found a virus on her machine - found that she had disabled the Anti-virus because it used up memory sheneeded.. Guess what no appologies from her boss or ours or her..
Sometimes no matter how sweet - accomidating - pleasent - it just doesn't work.. The problem isn't with the support staff its with the users - as the old saying goes - A LITTLE KNOWLEDGE IS DANGEROUS - And these end users are DANGEROUS -
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