Hi jaykaay,
Thank you for reaching Microsoft Community.
BitLocker Recovery Key is only consist of numbers and that is why it will only give you a keyboard with numbers only. Please try to check first if your BitLocker key is stored on your Microsoft Account. Go to these pages and sign in with your Microsoft Account that was set up on the device: Link1 : Link2
Enter the Recovery Key if found. If the Recovery key is not found on both link, I'm sorry but we'll have to perform a re-installation of Windows on the device using a USB Recovery Image. This option will reimage the entire device and reload Windows including the drivers and firmware. It is the most complete form of Reset. You will need also a 16GB/32GB of flash drive that must be formatted into FAT32 prior to downloading the Recovery Image. If you like to try, you can follow the steps provided below:
How to Download, Create and Use a USB recovery drive
To download the Recovery Image:
- You'll need a PC running Windows 7 or later or Surface Device.
- Visit the page to Download the recovery image for your Surface
- Sign in with your Microsoft Account
- From the list of Surface devices available, select the device that you need a recovery image for
Please note that while you will only be presented with devices that are currently registered on your account, you will also be presented with the option to get an image for a different type of device. If you try to use this option, you will be prompted to enter the serial number for that device 4. Download the recovery image using the button on the page 5. When the download bar pops up at the bottom of your screen, save the file in a location you will be able to find it.
Format USB Drive:
- Note: Formatting a recovery drive will erase anything that is already stored on your USB drive. Make sure to transfer any important data from your USB drive to another storage device before using it to create a Surface USB recovery drive.
- Insert your USB drive into the USB port of your PC.
- From the desktop, open File Explorer
- Tap and hold or right-click on the USB drive and choose Format
- Select FAT32 as the file system and enter a Volume label to name the USB drive, such as RECOVERY, and then tap or click Start
- Tap or click OK to erase the contents of the USB drive
- Tap or click OK when the format is complete
Create a recovery drive:
- On your Surface or PC, open recovery image that you downloaded by double-clicking it or right click then select Extract and then Extract all.
- Select the USB drive you formatted earlier for the location and click Extract.
Use a USB recovery drive to reset your Surface:
- Shutdown the Surface
- Insert the USB recovery drive into the USB port
- Press and hold the volume-down (-) rocker
- Press and release the power button
- When the Surface logo appears, release the volume-down (-) rocker
- Surface will start the recovery software on the USB recovery drive
- When prompted, choose your language options and keyboard layout
- Select Troubleshoot
- Select Recover from a Drive. Choose Remove Everything and Fully Clean the Drive. Recovering this PC.
- If prompted, select Repartition the drives
- If prompted for BitLocker Key, tap Skip this Drive
Hope this helps.