update matadata-fix issue

Author: TobyTu

articles/vpn-gateway/vpn-gateway-troubleshoot-vpn-point-to-site-connection-problems.md

@@ -80,7 +80,7 @@ To prepare Windows 10 or Server 2016 for IKEv2:
    | Windows 10 Version 1709 | March 22, 2018 | [KB4089848](https://www.catalog.update.microsoft.com/search.aspx?q=kb4089848) |
    |  |  |  |  |
 
-2. Set the registry key value. Create or set ��HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\RasMan\ IKEv2\DisableCertReqPayload�� REG_DWORD key in the registry to 1.
+2. Set the registry key value. Create or set `HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\RasMan\ IKEv2\DisableCertReqPayload` REG_DWORD key in the registry to 1.
 
 ## VPN client error: The message received was unexpected or badly formatted
 
@@ -377,7 +377,7 @@ This is caused by an incorrect gateway type is configured.
 
 The Azure VPN gateway type must be VPN and the VPN type must be **RouteBased**.
 
-## VPN package installer doesn��t complete
+## VPN package installer doesn't complete
 
 ### Cause
 

articles/vpn-gateway/vpn-gateway-validate-throughput-to-vnet.md

@@ -226,7 +226,7 @@ Even if the overall throughput assessed with the previous steps (iPERF/NTTTCP/et
    ![Slow file copy issues](./media/vpn-gateway-validate-throughput-to-vnet/Richcopy.png)<br>
 
    > [!Note]
-   > Not all application work same, and not all application/process utilizes all the threads. If you run the test, you could see some threads being empty and won��t provide accurate throughput results.
+   > Not all application work same, and not all application/process utilizes all the threads. If you run the test, you could see some threads being empty and won't provide accurate throughput results.
    > To check your application file transfer performance, use multi-thread by increasing the # of thread in succession or decrease in order to find the optimal throughput of the application or file transfer.
 
 * Insufficient VM disk read/write speed. For more information, see [Azure Storage Troubleshooting](../storage/common/storage-e2e-troubleshooting.md).
@@ -255,7 +255,7 @@ You can check latency by using the following tools:
 
 If you notice a high latency spike at any of the hops before entering MS Network backbone, you may want to proceed with further investigations with your Internet Service Provider.
 
-If a large, unusual latency spike is noticed from hops within ��msn.net��, please contact MS support for further investigations.
+If a large, unusual latency spike is noticed from hops within "msn.net", please contact MS support for further investigations.
 
 ## Next steps