I try to install Complete MiKTeX 2.9 But there is this:

``````Error: The operation could not be completed because the following file failed verification:

C:\...\mikTex\toptesi.tar.lzma
``````

There is the same with the basic version.

How can I solve my problem?

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It seems you have downloaded the files to your hard disk and trying to install from there. Some files are corrupted. Try downloading again. –  Harish Kumar Nov 10 '13 at 1:54
Welcome to TeX.SX! You can have a look at our starter guide to familiarize yourself further with our format. –  Harish Kumar Nov 10 '13 at 1:56
I try downloading again, but there is the same –  Belochka Nov 10 '13 at 2:18
Try with a different MiKTeX repository … (and it would be nice, if you'd change your user name to a more expressive one). –  Speravir Nov 10 '13 at 3:34
I tried with the different repositories, but there is also the same error –  Belochka Nov 10 '13 at 11:41