Why Mathematica freezes after inserting two letters?

[haneff (Hans Neff)]

Mathematica version 9.01 works very well an my Windows XP system.

Now, I have updated zu version 10 on a new Windows 7 system, 64bit,
same hardware: AMD Athlon™ II X2 245 Processor, 2900 MHz, 2 Kern., 4GB RAM

The starting process takes 80 seconds until the welcome screen.
In the meantime, I get the message: “Formatting Notebook Contents”.

Next, I start a small nb-File, it is open immediately.
But, now I can insert only two letters ! Pr instead of PrimeQ[ ]

The systems freezes for about 40 seconds and in the headline appears
“No response”, no input is possible …

After the 40 seconds, Mathematica works well for a moment.
In the next cell, I can insert only two letters, waiting 40 seconds,
and so on.

I have deleted the Directory \ProgramData\Mathematica and
Users\Neff\Appdata\Roaming\Mathematica and
make a new activation - same result.

Kaspersky’s Antivirus tells “no viruses”,
Malwarebytes says “no malware”.

I have installed Mathematica in the directory C:\math_Maa
Is ist possible, that this Underscore makes the problem?

Now, what can I do? I’m despaired. Thanks for any answer

Hans

[mthiel (Marco Thiel)]

This might be useful

Can my start up time for Mathematica 10 be decreased?

Since about Version 6 it has taken longer and longer to start up Mathematica. In Version 10 on my HP Pavilion HPE Series it takes a little over a minute. Is this common experience? Is there some way to decrease this time? Does it have any thing to do with virus checking? I guess that one possible solution is to just leave the Mathematica FrontEnd open all the time, say by keeping the Documentation Center open but minimized.

Mathematica 10: Notebook Freezing (auto-completion?)

I’ve just installed Mathematica 10, on Windows 7, but am having problems with the notebook freezing. Specifically, the problem seems to occur when typing functions, at the point where the predictive interface will try to suggest an autocomplete for the function. The notebook will freeze for 30 secs or so, and the window will report “not responding”. It resolves itself eventually, presenting the autocomplete menu, but the delay makes using MMA 10 practically impossible. The kernel seems to be fi…

There were people having problems when certain usb devices were connected. I would try to disconnect as many usb devices as possible.
Also under Preferences on the Tab interface you might want to disable things like dynamic and automatic etc. temporarily to figure out what the problem is.

Cheers,
Marco