Win10 can't be installed in many ways Problems with NET3.5

1、 Preface

   At present, many computer systems do not bring .Net3.5 Of , But some software needs .Net3.5 Support for . In the installation .Net3.5 When , You will encounter various problems that cannot be installed . The following are listed one by one for your reference .

2、 step

2.1 Windows Download and installation functions provided

  win + R Open the run box , Input control , As shown in the figure below ：

   Pop up after confirmation Control panel , choice Program ==> Start or close Windows function ,

   Check .Net3.5 Then make sure , Pop up search box , And prompt to download the file , Here's the picture ：

   Click to download , Wait for the download and restart .

2.2 Windows The built-in download function cannot be downloaded

   Think everything OK, Prepare to shut down and restart , little does one think Windows Service dishes , Sometimes the above steps cannot be downloaded , appear Windows Unable to complete the requested change , As shown in the figure below , It needs to be further solved .

   First Win + R Open the run box , Input services.msc, The service pop-up window pops up after confirmation . find windows installer service , If not started , Double click to pop up the attribute interface to start it .

   And then find Windows Update service , Double click to open the properties window , take ‘ Start type ’ Change to automatic , Operation as shown in the following figure .

   Last Win + R Open the run box , Input cmd Get into doc Command line interface , Input sfc /scannow, Wait for scanning and restart .

2.3 sfc /scannow Unable to scan normally

   backfire , Sometimes the above steps still don't work , I really want to smash the computer , Some files cannot be repaired , As shown in the figure below , And where to go ？

   In this case, enter DISM.exe /Online /Cleanup-image /Scanhealth and DISM.exe /Online /Cleanup-image /Restorehealth, Waiting for the installation , Notice the space before the backslash .

   Wait for deployment , Input again sfc /scannow, Wait for scanning and restart .

2.4 Manual installation

   So many steps , Results found , All previous efforts have been wasted , The chest is about to burst . Can't , We can only continue to harden our heads and continue to find solutions .

   After searching the data step by step, I found , There is another kind. , Is to look for Windows 10 Systematic ios Mirror image file , That is, the files used to reinstall the system . After extracting the file , Find the... In the catalog source/sxs Folder , Put it on D Disc or E Disk under the root directory of any disk .

without IOS Image file , You can also search online win 10 IOS In the image file source File for selective download .

  Win + R Open the run box , Input cmd Get into doc Command line interface , Input dism.exe /online /enable-feature /featurename:NetFX3 /Source:D:\sxs, Pay attention here , I will sxs It's on the D disc , therefore Source:D:\sxs Medium D Represent sxs The path of .

   Wait for installation , Absolutely successful . Then verify , according to 2.1 The steps are as follows interface , It is found that .Net3.5 , This proves success .