keil5 MDK编写stm32时出现头文件无法打开，重装了还是没法使用，请问这是怎么回事呢？

*** Using Compiler 'V5.06 update 1 (build 61)', folder: 'D:\Keil_v5\ARM\ARMCC\Bin'
Rebuild target 'Target 1'
compiling core_cm3.c...
CMSIS\core_cm3.c(24): error: #5: cannot open source input file "stdint.h": No such file or directory
#include
CMSIS\core_cm3.c: 0 warnings, 1 error
compiling system_stm32f10x.c...
CMSIS\core_cm3.h(90): error: #5: cannot open source input file "stdint.h": No such file or directory
#include /* Include standard types /
CMSIS\system_stm32f10x.c: 0 warnings, 1 error
compiling misc.c...
.\CMSIS\core_cm3.h(90): error: #5: cannot open source input file "stdint.h": No such file or directory
#include / Include standard types /
Lib\src\misc.c: 0 warnings, 1 error
compiling stm32f10x_bkp.c...
.\CMSIS\core_cm3.h(90): error: #5: cannot open source input file "stdint.h": No such file or directory
#include / Include standard types /
Lib\src\stm32f10x_bkp.c: 0 warnings, 1 error
compiling stm32f10x_adc.c...
.\CMSIS\core_cm3.h(90): error: #5: cannot open source input file "stdint.h": No such file or directory
#include / Include standard types /
Lib\src\stm32f10x_adc.c: 0 warnings, 1 error
compiling stm32f10x_can.c...
.\CMSIS\core_cm3.h(90): error: #5: cannot open source input file "stdint.h": No such file or directory
#include / Include standard types /
Lib\src\stm32f10x_can.c: 0 warnings, 1 error
compiling stm32f10x_cec.c...
.\CMSIS\core_cm3.h(90): error: #5: cannot open source input file "stdint.h": No such file or directory
#include / Include standard types /
Lib\src\stm32f10x_cec.c: 0 warnings, 1 error
compiling stm32f10x_crc.c...
.\CMSIS\core_cm3.h(90): error: #5: cannot open source input file "stdint.h": No such file or directory
#include / Include standard types /
Lib\src\stm32f10x_crc.c: 0 warnings, 1 error
compiling stm32f10x_dac.c...
.\CMSIS\core_cm3.h(90): error: #5: cannot open source input file "stdint.h": No such file or directory
#include / Include standard types /
Lib\src\stm32f10x_dac.c: 0 warnings, 1 error
compiling stm32f10x_dma.c...
.\CMSIS\core_cm3.h(90): error: #5: cannot open source input file "stdint.h": No such file or directory
#include / Include standard types /
Lib\src\stm32f10x_dma.c: 0 warnings, 1 error
compiling stm32f10x_dbgmcu.c...
.\CMSIS\core_cm3.h(90): error: #5: cannot open source input file "stdint.h": No such file or directory
#include / Include standard types /
Lib\src\stm32f10x_dbgmcu.c: 0 warnings, 1 error
compiling stm32f10x_exti.c...
.\CMSIS\core_cm3.h(90): error: #5: cannot open source input file "stdint.h": No such file or directory
#include / Include standard types /
Lib\src\stm32f10x_exti.c: 0 warnings, 1 error
compiling stm32f10x_flash.c...
.\CMSIS\core_cm3.h(90): error: #5: cannot open source input file "stdint.h": No such file or directory
#include / Include standard types /
Lib\src\stm32f10x_flash.c: 0 warnings, 1 error
compiling stm32f10x_fsmc.c...
.\CMSIS\core_cm3.h(90): error: #5: cannot open source input file "stdint.h": No such file or directory
#include / Include standard types /
Lib\src\stm32f10x_fsmc.c: 0 warnings, 1 error
compiling stm32f10x_gpio.c...
.\CMSIS\core_cm3.h(90): error: #5: cannot open source input file "stdint.h": No such file or directory
#include / Include standard types /
Lib\src\stm32f10x_gpio.c: 0 warnings, 1 error
compiling stm32f10x_i2c.c...
.\CMSIS\core_cm3.h(90): error: #5: cannot open source input file "stdint.h": No such file or directory
#include / Include standard types /
Lib\src\stm32f10x_i2c.c: 0 warnings, 1 error
compiling stm32f10x_iwdg.c...
.\CMSIS\core_cm3.h(90): error: #5: cannot open source input file "stdint.h": No such file or directory
#include / Include standard types /
Lib\src\stm32f10x_iwdg.c: 0 warnings, 1 error
compiling stm32f10x_pwr.c...
.\CMSIS\core_cm3.h(90): error: #5: cannot open source input file "stdint.h": No such file or directory
#include / Include standard types /
Lib\src\stm32f10x_pwr.c: 0 warnings, 1 error
compiling stm32f10x_rtc.c...
.\CMSIS\core_cm3.h(90): error: #5: cannot open source input file "stdint.h": No such file or directory
#include / Include standard types /
Lib\src\stm32f10x_rtc.c: 0 warnings, 1 error
compiling stm32f10x_rcc.c...
.\CMSIS\core_cm3.h(90): error: #5: cannot open source input file "stdint.h": No such file or directory
#include / Include standard types /
Lib\src\stm32f10x_rcc.c: 0 warnings, 1 error
compiling stm32f10x_sdio.c...
.\CMSIS\core_cm3.h(90): error: #5: cannot open source input file "stdint.h": No such file or directory
#include / Include standard types /
Lib\src\stm32f10x_sdio.c: 0 warnings, 1 error
compiling stm32f10x_spi.c...
.\CMSIS\core_cm3.h(90): error: #5: cannot open source input file "stdint.h": No such file or directory
#include / Include standard types /
Lib\src\stm32f10x_spi.c: 0 warnings, 1 error
compiling stm32f10x_tim.c...
.\CMSIS\core_cm3.h(90): error: #5: cannot open source input file "stdint.h": No such file or directory
#include / Include standard types /
Lib\src\stm32f10x_tim.c: 0 warnings, 1 error
compiling stm32f10x_usart.c...
.\CMSIS\core_cm3.h(90): error: #5: cannot open source input file "stdint.h": No such file or directory
#include / Include standard types /
Lib\src\stm32f10x_usart.c: 0 warnings, 1 error
compiling stm32f10x_wwdg.c...
.\CMSIS\core_cm3.h(90): error: #5: cannot open source input file "stdint.h": No such file or directory
#include / Include standard types /
Lib\src\stm32f10x_wwdg.c: 0 warnings, 1 error
compiling main.c...
.\CMSIS\core_cm3.h(90): error: #5: cannot open source input file "stdint.h": No such file or directory
#include / Include standard types /
User\main.c: 0 warnings, 1 error
assembling startup_stm32f10x_md.s...
compiling stm32f10x_it.c...
.\CMSIS\core_cm3.h(90): error: #5: cannot open source input file "stdint.h": No such file or directory
#include / Include standard types */
User\stm32f10x_it.c: 0 warnings, 1 error
".\Objects\test.axf" - 27 Error(s), 0 Warning(s).
Target not created.
Build Time Elapsed: 00:00:13