Some good news, and some bad news. The good news is that Lenovo computers come with a pre-installed program called Accelerator, which helps to speed up certain Windows applications.
The bad news? There's a serious security vulnerability in Accelerator, which could allow someone to install a program on your computer by disguising it as an updated version of Accelerator.
Lenovo is therefore recommending that you uninstall Accelerator, if it's present on your PC or laptop.
Details of the affected computers, and how to remove Accelerator, are at https://support.lenovo.com/gb/en/product_security/len_6718 and you really should check it out as soon as you can.
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